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Digital signal splitting among multiple DACs for analog bandwidth interleaving (ABI)

: Schmidt, C.; Tanzil, V.H.; Kottke, C.; Freund, R.; Jungnickel, V.


Vladimirescu, A. ; Institute of Electrical and Electronics Engineers -IEEE-; IEEE Circuits and Systems Society:
IEEE International Conference on Electronics, Circuits and Systems, ICECS 2016 : 11-14 Dec. 2016, Monte Carlo
Piscataway, NJ: IEEE, 2016
ISBN: 978-1-5090-6113-6
ISBN: 978-1-5090-6112-9
ISBN: 978-1-5090-6114-3 (Print)
International Conference on Electronics Circuits and Systems (ICECS) <23, 2016, Monte Carlo>
Fraunhofer HHI ()

A novel concept called analog bandwidth interleaving (ABI) has been recently introduced in order to overcome bandwidth limitations of digital-to-analog converters (DACs) by interleaving the output signals of multiple DACs in the frequency domain. We present for the first time the fundamental interdependencies between bandwidth, sample rate, the number of samples, and the local oscillator frequencies for ABI-DACs. Furthermore, a mathematical expression for the splitting of the digital signal among multiple DACs is presented. Simulations for an exemplary ABI-DAC highlight the interdependencies between the system parameters and difficulties concerning integer solutions.